Thanks for the reply. I looked at the 13" wheel, but I still need the speed brake. By going with 1.25 inch small pulleys, along with a 4 inch on the large end of the brake, I can keep my 8.675 wheel (saving some money and keeping overall height down) and get 77 RPM. If I go with a 4.5 inch pulley I can drop to about 70 RPM. Glad to hear that 75 RPM is in the ball park. I think I can get there. Thanks, Al
